I would argue on the scope mounting suggestion, as I have strayed away from Leupold mounts after almost 20 years of using them. LOL I honestly feel that a good quality picatinny rail and a good set of rings is stronger and more precise than the old Leupold dove-tail and windage rings & bases. Nothing wrong with the Leupold, I just feel that the pic rail is stronger and locks the scope down better. Also it adds some rigidity to the action if you are shooting a very large caliber with lots of pressure.
But I do agree that the easiest way to find out if a Remington will shoot is to bed the action, float the barrel, lap the bore, tune the trigger, properly torque the action screws, and ladder test handloads in it till you find your peak accuracy. When you do, that's as good as it's gonna shoot, until you put an aftermarket barrel on it.